/*!	 valuelink.cpp
**	 ValueBase Link Implementation File
**
**	Copyright (c) 2004 Adrian Bentley
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <synfig/general.h>

#include "valuelink.h"

#include <gui/localization.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;

using studio::ValueBaseLink;

// structors
ValueBaseLink::ValueBaseLink()
{
    assert(0); // CHECK: This class does not appear to be used.
}

ValueBaseLink::~ValueBaseLink()
{
}

// link access

ValueNode::LooseHandle ValueBaseLink::get_link_vfunc(int i)const
{

    if (i >= 0 && i < (int)list.size()) {
        return list[i];
    } else {
        return ValueNode::LooseHandle();
    }
}

// more link access
int ValueBaseLink::link_count()const
{
    return list.size();
}

String ValueBaseLink::link_local_name(int i)const
{
    ValueNode::LooseHandle h = get_link(i);

    if (h) {
        return h->get_local_name();
    } else {
        return String();
    }
}

String ValueBaseLink::link_name(int i)const
{
    ValueNode::LooseHandle h = get_link(i);

    if (h) {
        return h->get_name();
    } else {
        return String();
    }
}

int ValueBaseLink::get_link_index_from_name(const synfig::String &name)const
{
    for (int i = 0; i < link_count(); ++i)
        if (link_name(i) == name) {
            return i;
        }

    throw Exception::BadLinkName(name);
}

// list management stuff
ValueBaseLink::list_type::const_iterator ValueBaseLink::findlink(synfig::ValueNode::Handle x) const
{
    for (list_type::const_iterator i = list.begin(); i != list.end(); ++i) {
        if (*i == x) {
            return i;
        }
    }

    return list.end();
}
ValueBaseLink::list_type::iterator ValueBaseLink::findlink(synfig::ValueNode::Handle x)
{
    for (list_type::iterator i = list.begin(); i != list.end(); ++i) {
        if (*i == x) {
            return i;
        }
    }

    return list.end();
}

void ValueBaseLink::add(synfig::ValueNode::Handle v)
{
    list_type::iterator i = findlink(v);

    if (i != list.end()) {
        list.push_back(v);
    }
}

void ValueBaseLink::remove(synfig::ValueNode::Handle v)
{
    list_type::iterator i = findlink(v);

    if (i != list.end()) {
        if (i != list.end() - 1) {
            *i = list.back();
        }

        list.pop_back();
    }
}